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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 4 |
| 6 | 1 |
| 7 | 1 |
| 8 | 18 |
| 9 | 18 |
| 10 | 1 |
| 11 | 1 |
| 12 | 108 |
| 13 | 588 |
| 14 | 108 |
| 15 | 1 |
| 16 | 1 |
| 17 | 780 |
| 18 | 30240 |
| 19 | 30240 |
| 20 | 780 |
| 21 | 1 |
| 22 | 1 |
| 23 | 6600 |
| 24 | 2277600 |
| 25 | 17427192 |
| 26 | 2277600 |
| 27 | 6600 |
| 28 | 1 |
| 29 | 1 |
| 30 | 63840 |
| 31 | 234440280 |
| 32 | 17741309400 |
| 33 | 17741309400 |
| 34 | 234440280 |
| 35 | 63840 |
| 36 | 1 |
| 37 | 1 |
| 38 | 693840 |
| 39 | 31448589480 |
[1,1,1,1,4,1,1,18,18,1,1,108,588,108,1,1,780, 30240,30240,780,1,1,6600,2277600,17427192,2277600, 6600,1,1,63840,234440280,17741309400,17741309400, 234440280,63840,1,1,693840,31448589480] |